Element M Has the Valence Electron Configuration 3d⁶ 4s²

question 140

Multiple Choice

Element M has the valence electron configuration 3d⁶ 4s².What is the valence electron configuration of the M³⁺ ion?

• A)3d⁵
• B)3d³ 4s²
• C)3d⁴ 4s¹
• D)3d⁹ 4s²

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